/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
#pragma once

#include "JSSegmentedVariableObject.h"

namespace JSC {

class JSGlobalLexicalEnvironment : public JSSegmentedVariableObject {

public:
    typedef JSSegmentedVariableObject Base;

    static const unsigned StructureFlags = Base::StructureFlags | OverridesGetOwnPropertySlot | OverridesToThis;

    static JSGlobalLexicalEnvironment* create(VM& vm, Structure* structure, JSScope* parentScope)
    {
        JSGlobalLexicalEnvironment* result =
            new (NotNull, allocateCell<JSGlobalLexicalEnvironment>(vm.heap)) JSGlobalLexicalEnvironment(vm, structure, parentScope);
        result->finishCreation(vm);
        result->symbolTable()->setScopeType(SymbolTable::ScopeType::GlobalLexicalScope);
        return result;
    }

    static bool getOwnPropertySlot(JSObject*, ExecState*, PropertyName, PropertySlot&);
    static bool put(JSCell*, ExecState*, PropertyName, JSValue, PutPropertySlot&);

    static void destroy(JSCell*);
    // We don't need a destructor because we use a finalizer instead.
    static const bool needsDestruction = false;

    bool isEmpty() const { return !symbolTable()->size(); }
    bool isConstVariable(UniquedStringImpl*);

    static JSValue toThis(JSCell*, ExecState*, ECMAMode);
    
    DECLARE_INFO;

    static Structure* createStructure(VM& vm, JSGlobalObject* globalObject)
    {
        return Structure::create(vm, globalObject, jsNull(), TypeInfo(GlobalLexicalEnvironmentType, StructureFlags), info());
    }

protected:
    JSGlobalLexicalEnvironment(VM& vm, Structure* structure, JSScope* scope)
        : Base(vm, structure, scope)
    {
    }
};

} // namespace JSC
